Patch "ath: Fix updating radar flags for coutry code India" has been added to the 4.4-stable tree

Patch "ath: Fix updating radar flags for coutry code India" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ath: Fix updating radar flags for coutry code India

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ath-fix-updating-radar-flags-for-coutry-code-india.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Thu Mar 22 14:57:32 CET 2018
From: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Date: Wed, 12 Apr 2017 23:19:37 +0530
Subject: ath: Fix updating radar flags for coutry code India

From: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>


[ Upstream commit c0c345d4cacc6a1f39d4856f37dcf6e34f51a5e4 ]

As per latest regulatory update for India, channel 52, 56, 60, 64
is no longer restricted to DFS. Enabling DFS/no infra flags in driver
results in applying all DFS related restrictions (like doing CAC etc
before this channel moves to 'available state') for these channels
even though the country code is programmed as 'India' in he hardware,
fix this by relaxing the frequency range while applying RADAR flags
only if the country code is programmed to India. If the frequency range
needs to modified based on different country code, ath_is_radar_freq
can be extended/modified dynamically.

Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/wireless/ath/regd.c |   19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

--- a/drivers/net/wireless/ath/regd.c
+++ b/drivers/net/wireless/ath/regd.c
@@ -254,8 +254,12 @@ bool ath_is_49ghz_allowed(u16 regdomain)
 EXPORT_SYMBOL(ath_is_49ghz_allowed);
 
 /* Frequency is one where radar detection is required */
-static bool ath_is_radar_freq(u16 center_freq)
+static bool ath_is_radar_freq(u16 center_freq,
+			      struct ath_regulatory *reg)
+
 {
+	if (reg->country_code == CTRY_INDIA)
+		return (center_freq >= 5500 && center_freq <= 5700);
 	return (center_freq >= 5260 && center_freq <= 5700);
 }
 
@@ -306,7 +310,7 @@ __ath_reg_apply_beaconing_flags(struct w
 				enum nl80211_reg_initiator initiator,
 				struct ieee80211_channel *ch)
 {
-	if (ath_is_radar_freq(ch->center_freq) ||
+	if (ath_is_radar_freq(ch->center_freq, reg) ||
 	    (ch->flags & IEEE80211_CHAN_RADAR))
 		return;
 
@@ -395,8 +399,9 @@ ath_reg_apply_ir_flags(struct wiphy *wip
 	}
 }
 
-/* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
-static void ath_reg_apply_radar_flags(struct wiphy *wiphy)
+/* Always apply Radar/DFS rules on freq range 5500 MHz - 5700 MHz */
+static void ath_reg_apply_radar_flags(struct wiphy *wiphy,
+				      struct ath_regulatory *reg)
 {
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_channel *ch;
@@ -409,7 +414,7 @@ static void ath_reg_apply_radar_flags(st
 
 	for (i = 0; i < sband->n_channels; i++) {
 		ch = &sband->channels[i];
-		if (!ath_is_radar_freq(ch->center_freq))
+		if (!ath_is_radar_freq(ch->center_freq, reg))
 			continue;
 		/* We always enable radar detection/DFS on this
 		 * frequency range. Additionally we also apply on
@@ -505,7 +510,7 @@ void ath_reg_notifier_apply(struct wiphy
 	struct ath_common *common = container_of(reg, struct ath_common,
 						 regulatory);
 	/* We always apply this */
-	ath_reg_apply_radar_flags(wiphy);
+	ath_reg_apply_radar_flags(wiphy, reg);
 
 	/*
 	 * This would happen when we have sent a custom regulatory request
@@ -653,7 +658,7 @@ ath_regd_init_wiphy(struct ath_regulator
 	}
 
 	wiphy_apply_custom_regulatory(wiphy, regd);
-	ath_reg_apply_radar_flags(wiphy);
+	ath_reg_apply_radar_flags(wiphy, reg);
 	ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
 	return 0;
 }


Patches currently in stable-queue which might be from mohammed@qti.qualcomm.com are

queue-4.4/ath-fix-updating-radar-flags-for-coutry-code-india.patch